Interlayer film for laminated glass, and laminated glass

Abstract

The present invention aims to provide an interlayer film for a laminated glass capable of exhibiting high deaeration properties even in a nip roll method and hardly forming air bubbles to enable the production of a highly visible laminated glass, and a laminated glass including the interlayer film for a laminated glass. The present invention relates to an interlayer film for a laminated glass, having a large number of recesses and a large number of projections on at least one surface, the recesses each having a groove shape with a continuous bottom and being regularly adjacent to each other in parallel with one another, the recesses each having a groove shape with a continuous bottom having a ratio (R/Sm×100) of a radius of rotation R of the bottom to an interval Sm between the recesses of 15% or higher.

The invention claimed is: 
     
       1. An interlayer film for a laminated glass, having a large number of recesses and a large number of projections on at least one surface,
 the recesses each having a groove shape with a continuous bottom and being regularly adjacent to each other in parallel with one another, 
 the recesses each having a groove shape with a continuous bottom having a ratio (R/Sm×100) of a radius of rotation R of the bottom to an interval Sm between the recesses of 15% or higher, and 
 wherein the interval Sm between the recesses each having a groove shape with a continuous bottom is 300 μm or less. 
 
     
     
       2. The interlayer film for a laminated glass according to  claim 1 ,
 wherein the recesses each having a groove shape with a continuous bottom have a radius of rotation R of the bottom of 20 to 250 μm. 
 
     
     
       3. The interlayer film for a laminated glass according to  claim 2 ,
 wherein the interval Sm between the recesses each having a groove shape with a continuous bottom is 100 to 300 μm. 
 
     
     
       4. The interlayer film for a laminated glass according to  claim 1 ,
 wherein the interval Sm between the recesses each having a groove shape with a continuous bottom is 100 to 300 μm. 
 
     
     
       5. A laminated glass, comprising:
 a pair of glass plates; and 
 the interlayer film for a laminated glass according to  claim 1  interposed between the pair of glass plates. 
 
     
     
       6. A laminated glass, comprising:
 a pair of glass plates; and 
 the interlayer film for a laminated glass according to  claim 2  interposed between the pair of glass plates. 
 
     
     
       7. A laminated glass, comprising:
 a pair of glass plates; and 
 the interlayer film for a laminated glass according to  claim 3  interposed between the pair of glass plates. 
 
     
     
       8. A laminated glass, comprising:
 a pair of glass plates; and 
 the interlayer film for a laminated glass according to  claim 4  interposed between the pair of glass plates.